Strategies for Effective Roundabout Speed Reduction

Summary:

Appropriate deceleration on approaches to roundabouts is primarily accomplished through the use of applicable geometric design principles. However, traffic control devices (specifically signing and markings on approach) also serve a vital role in communicating to the approaching driver what speed profile should be anticipated. This research provides a resource for engineers to identify and select appropriate speed-reduction treatments for high- speed approaches to roundabouts. It examines best practices and techniques that are the most effective at lowering approach speed.

Final Deliverables:

• Quick Reference Guide: Strategies for Effective Roundabout Speed Reduction (Guidebook #2022RIC03Q)
• Strategies for Effective Roundabout Speed Reduction (Report #2022RIC03)

Related Materials:

Related Research:

• Final Report 2017-14: Strategies for Effective Roundabout Approach Speed Reduction
• Signing for Effective Roundabout Approach Speed Reduction

Project Personnel:

Principal Investigator:  Tim Arvidson

Co-Principal Investigator:  Kate Miner

Technical Liaison:  Joe Gustafson

Project Coordinator:  Marcus Bekele

Panel Members: 
Dan McCormick - Hennepin County Public Works
Marc Briese - Transportation System Management
Sara Buermann - Wright County
Steven McBurney - Traffic Engineering